./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f25d9c7e70f7f3d19e85c7cfc6427443102f5451f704dd6a19dd9a78d021a612 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:45:41,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:45:41,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:45:41,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:45:41,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:45:41,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:45:41,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:45:41,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:45:41,925 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:45:41,926 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:45:41,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:45:41,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:45:41,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:45:41,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:45:41,941 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:45:41,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:45:41,942 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:45:41,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:45:41,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:45:41,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:45:41,944 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:45:41,945 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:45:41,945 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:45:41,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:45:41,946 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:45:41,947 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:45:41,947 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:45:41,948 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:45:41,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:45:41,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:45:41,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:45:41,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:45:41,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:41,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:45:41,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:45:41,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:45:41,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:45:41,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:45:41,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:45:41,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:45:41,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:45:41,953 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f25d9c7e70f7f3d19e85c7cfc6427443102f5451f704dd6a19dd9a78d021a612 [2023-11-24 21:45:42,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:45:42,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:45:42,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:45:42,277 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:45:42,278 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:45:42,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2023-11-24 21:45:45,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:45:45,695 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:45:45,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2023-11-24 21:45:45,706 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/data/77c9b96ba/6ab900b8602345d2b02b205743dbc22d/FLAG42c648aa8 [2023-11-24 21:45:45,725 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/data/77c9b96ba/6ab900b8602345d2b02b205743dbc22d [2023-11-24 21:45:45,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:45:45,734 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:45:45,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:45,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:45:45,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:45:45,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:45" (1/1) ... [2023-11-24 21:45:45,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf5a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:45, skipping insertion in model container [2023-11-24 21:45:45,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:45" (1/1) ... [2023-11-24 21:45:45,816 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:45:46,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:46,048 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:45:46,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:46,091 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:45:46,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46 WrapperNode [2023-11-24 21:45:46,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:46,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:45:46,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:45:46,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:45:46,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,136 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-24 21:45:46,137 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:45:46,137 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:45:46,138 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:45:46,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:45:46,151 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,155 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,173 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 21:45:46,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,191 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:45:46,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:45:46,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:45:46,197 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:45:46,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (1/1) ... [2023-11-24 21:45:46,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:46,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:45:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:45:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:45:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:45:46,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:45:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:45:46,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:45:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 21:45:46,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 21:45:46,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:45:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:45:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:45:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:45:46,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:45:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:45:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:45:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:45:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:45:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:45:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:45:46,301 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:45:46,435 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:45:46,437 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:45:46,738 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:45:46,995 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:45:46,996 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:45:46,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:45:46 BoogieIcfgContainer [2023-11-24 21:45:46,996 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:45:47,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:45:47,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:45:47,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:45:47,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:45:45" (1/3) ... [2023-11-24 21:45:47,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5337e586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:45:47, skipping insertion in model container [2023-11-24 21:45:47,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:46" (2/3) ... [2023-11-24 21:45:47,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5337e586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:45:47, skipping insertion in model container [2023-11-24 21:45:47,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:45:46" (3/3) ... [2023-11-24 21:45:47,033 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2023-11-24 21:45:47,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:45:47,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:45:47,056 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:45:47,152 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:45:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 61 transitions, 150 flow [2023-11-24 21:45:47,310 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2023-11-24 21:45:47,310 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:45:47,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 57 events. 4/57 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-24 21:45:47,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 61 transitions, 150 flow [2023-11-24 21:45:47,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 136 flow [2023-11-24 21:45:47,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:45:47,377 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5716d2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:45:47,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-24 21:45:47,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:45:47,381 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:45:47,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:45:47,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:45:47,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:47,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash 11063, now seen corresponding path program 1 times [2023-11-24 21:45:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981821903] [2023-11-24 21:45:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981821903] [2023-11-24 21:45:47,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981821903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:47,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88843205] [2023-11-24 21:45:47,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:47,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:47,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:45:47,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:47,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:47,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:45:47,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:48,468 INFO L124 PetriNetUnfolderBase]: 1488/2142 cut-off events. [2023-11-24 21:45:48,469 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-24 21:45:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 2142 events. 1488/2142 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8783 event pairs, 691 based on Foata normal form. 1/1227 useless extension candidates. Maximal degree in co-relation 3527. Up to 1825 conditions per place. [2023-11-24 21:45:48,501 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:45:48,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 176 flow [2023-11-24 21:45:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-24 21:45:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2023-11-24 21:45:48,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-24 21:45:48,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-24 21:45:48,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:48,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-24 21:45:48,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:48,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:48,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:48,538 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 136 flow. Second operand 3 states and 126 transitions. [2023-11-24 21:45:48,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 176 flow [2023-11-24 21:45:48,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 160 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:45:48,554 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 114 flow [2023-11-24 21:45:48,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-11-24 21:45:48,561 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-24 21:45:48,561 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 114 flow [2023-11-24 21:45:48,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:48,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:48,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:45:48,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:45:48,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:48,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 11064, now seen corresponding path program 1 times [2023-11-24 21:45:48,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:48,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536741784] [2023-11-24 21:45:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:48,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:48,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:48,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536741784] [2023-11-24 21:45:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536741784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:48,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205474524] [2023-11-24 21:45:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:49,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:45:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:45:49,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:49,218 INFO L124 PetriNetUnfolderBase]: 1056/1576 cut-off events. [2023-11-24 21:45:49,219 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:45:49,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2931 conditions, 1576 events. 1056/1576 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6393 event pairs, 475 based on Foata normal form. 82/980 useless extension candidates. Maximal degree in co-relation 2925. Up to 1311 conditions per place. [2023-11-24 21:45:49,235 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:45:49,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 154 flow [2023-11-24 21:45:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:45:49,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:45:49,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:45:49,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:45:49,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:49,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:45:49,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,243 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 114 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:45:49,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 154 flow [2023-11-24 21:45:49,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:49,246 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 111 flow [2023-11-24 21:45:49,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-24 21:45:49,247 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-11-24 21:45:49,247 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 111 flow [2023-11-24 21:45:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:49,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:45:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:45:49,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 329901915, now seen corresponding path program 1 times [2023-11-24 21:45:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:49,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122552395] [2023-11-24 21:45:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122552395] [2023-11-24 21:45:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122552395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:49,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057089443] [2023-11-24 21:45:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:49,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:45:49,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:49,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:45:49,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:49,629 INFO L124 PetriNetUnfolderBase]: 1164/1690 cut-off events. [2023-11-24 21:45:49,630 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-24 21:45:49,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 1690 events. 1164/1690 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6637 event pairs, 530 based on Foata normal form. 0/993 useless extension candidates. Maximal degree in co-relation 3176. Up to 1448 conditions per place. [2023-11-24 21:45:49,647 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-24 21:45:49,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 155 flow [2023-11-24 21:45:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:45:49,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:45:49,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:45:49,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:45:49,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:49,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:45:49,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,656 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 111 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:45:49,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 155 flow [2023-11-24 21:45:49,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:49,658 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 108 flow [2023-11-24 21:45:49,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-24 21:45:49,660 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2023-11-24 21:45:49,660 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 108 flow [2023-11-24 21:45:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:49,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:45:49,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:45:49,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:49,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 329901916, now seen corresponding path program 1 times [2023-11-24 21:45:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394937439] [2023-11-24 21:45:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:49,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394937439] [2023-11-24 21:45:49,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394937439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:49,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:49,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098374410] [2023-11-24 21:45:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:49,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:49,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:45:49,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:49,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:49,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:45:49,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:50,068 INFO L124 PetriNetUnfolderBase]: 1056/1536 cut-off events. [2023-11-24 21:45:50,069 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:45:50,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 1536 events. 1056/1536 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5984 event pairs, 475 based on Foata normal form. 30/928 useless extension candidates. Maximal degree in co-relation 2885. Up to 1311 conditions per place. [2023-11-24 21:45:50,084 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 21:45:50,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 148 flow [2023-11-24 21:45:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:45:50,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:45:50,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:50,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,089 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 108 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:45:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 148 flow [2023-11-24 21:45:50,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:50,092 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 105 flow [2023-11-24 21:45:50,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-24 21:45:50,093 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-24 21:45:50,093 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 105 flow [2023-11-24 21:45:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:50,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:45:50,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1223105491, now seen corresponding path program 1 times [2023-11-24 21:45:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890529399] [2023-11-24 21:45:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:50,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890529399] [2023-11-24 21:45:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890529399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:50,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:50,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440678247] [2023-11-24 21:45:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:50,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:50,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:50,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:45:50,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:50,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:45:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:50,400 INFO L124 PetriNetUnfolderBase]: 1088/1566 cut-off events. [2023-11-24 21:45:50,400 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-24 21:45:50,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1566 events. 1088/1566 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6036 event pairs, 494 based on Foata normal form. 0/935 useless extension candidates. Maximal degree in co-relation 2962. Up to 1358 conditions per place. [2023-11-24 21:45:50,415 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-24 21:45:50,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 149 flow [2023-11-24 21:45:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:45:50,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:45:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:45:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:45:50,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:50,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:45:50,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,421 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 105 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:45:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 149 flow [2023-11-24 21:45:50,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:50,423 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 102 flow [2023-11-24 21:45:50,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-24 21:45:50,424 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-24 21:45:50,425 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 102 flow [2023-11-24 21:45:50,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:50,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:45:50,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:50,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1223105492, now seen corresponding path program 1 times [2023-11-24 21:45:50,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761029033] [2023-11-24 21:45:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:50,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:50,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761029033] [2023-11-24 21:45:50,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761029033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:50,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976869104] [2023-11-24 21:45:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:50,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:50,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:45:50,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:50,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:45:50,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:50,802 INFO L124 PetriNetUnfolderBase]: 1056/1512 cut-off events. [2023-11-24 21:45:50,802 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:45:50,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 1512 events. 1056/1512 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5800 event pairs, 475 based on Foata normal form. 18/916 useless extension candidates. Maximal degree in co-relation 2861. Up to 1311 conditions per place. [2023-11-24 21:45:50,818 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-24 21:45:50,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 142 flow [2023-11-24 21:45:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:45:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:45:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:50,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:45:50,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,825 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 102 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:45:50,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 142 flow [2023-11-24 21:45:50,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:50,827 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 99 flow [2023-11-24 21:45:50,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-24 21:45:50,829 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-24 21:45:50,829 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 99 flow [2023-11-24 21:45:50,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:50,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:50,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:45:50,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:50,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -966530096, now seen corresponding path program 1 times [2023-11-24 21:45:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:50,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632394265] [2023-11-24 21:45:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632394265] [2023-11-24 21:45:50,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632394265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:50,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261424137] [2023-11-24 21:45:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:50,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 61 [2023-11-24 21:45:50,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:50,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:50,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 61 [2023-11-24 21:45:50,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:51,127 INFO L124 PetriNetUnfolderBase]: 1108/1554 cut-off events. [2023-11-24 21:45:51,127 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-24 21:45:51,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1554 events. 1108/1554 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5798 event pairs, 510 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2976. Up to 1384 conditions per place. [2023-11-24 21:45:51,163 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 23 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-24 21:45:51,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 143 flow [2023-11-24 21:45:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-24 21:45:51,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2023-11-24 21:45:51,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-24 21:45:51,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-24 21:45:51,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:51,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-24 21:45:51,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,171 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 99 flow. Second operand 3 states and 125 transitions. [2023-11-24 21:45:51,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 143 flow [2023-11-24 21:45:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:51,173 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 96 flow [2023-11-24 21:45:51,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-24 21:45:51,174 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -16 predicate places. [2023-11-24 21:45:51,175 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 96 flow [2023-11-24 21:45:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:51,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:45:51,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:51,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash -966530095, now seen corresponding path program 1 times [2023-11-24 21:45:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:51,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985352909] [2023-11-24 21:45:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:51,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:51,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:51,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985352909] [2023-11-24 21:45:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985352909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:51,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:51,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070821876] [2023-11-24 21:45:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:51,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 61 [2023-11-24 21:45:51,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:51,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 61 [2023-11-24 21:45:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:51,480 INFO L124 PetriNetUnfolderBase]: 1056/1472 cut-off events. [2023-11-24 21:45:51,480 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-24 21:45:51,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1472 events. 1056/1472 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5376 event pairs, 475 based on Foata normal form. 30/928 useless extension candidates. Maximal degree in co-relation 2821. Up to 1311 conditions per place. [2023-11-24 21:45:51,496 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-24 21:45:51,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 136 flow [2023-11-24 21:45:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:45:51,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7049180327868853 [2023-11-24 21:45:51,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:45:51,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:45:51,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:51,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:45:51,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,500 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 96 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:45:51,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 136 flow [2023-11-24 21:45:51,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:51,502 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 93 flow [2023-11-24 21:45:51,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-11-24 21:45:51,505 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -17 predicate places. [2023-11-24 21:45:51,505 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 93 flow [2023-11-24 21:45:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:45:51,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:51,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1084837963, now seen corresponding path program 1 times [2023-11-24 21:45:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111405883] [2023-11-24 21:45:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:51,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111405883] [2023-11-24 21:45:51,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111405883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:51,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:51,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:45:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417483564] [2023-11-24 21:45:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:51,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:51,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:51,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:51,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:51,951 INFO L124 PetriNetUnfolderBase]: 1367/1869 cut-off events. [2023-11-24 21:45:51,951 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-24 21:45:51,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3647 conditions, 1869 events. 1367/1869 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6608 event pairs, 131 based on Foata normal form. 1/1137 useless extension candidates. Maximal degree in co-relation 3634. Up to 1541 conditions per place. [2023-11-24 21:45:51,967 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 35 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-11-24 21:45:51,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 220 flow [2023-11-24 21:45:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-24 21:45:51,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-24 21:45:51,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-24 21:45:51,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-24 21:45:51,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:51,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-24 21:45:51,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,971 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 93 flow. Second operand 3 states and 153 transitions. [2023-11-24 21:45:51,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 220 flow [2023-11-24 21:45:51,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:51,974 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 125 flow [2023-11-24 21:45:51,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-24 21:45:51,976 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-24 21:45:51,976 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 125 flow [2023-11-24 21:45:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:51,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:51,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:45:51,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1693714013, now seen corresponding path program 1 times [2023-11-24 21:45:51,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:51,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019798832] [2023-11-24 21:45:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019798832] [2023-11-24 21:45:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019798832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:52,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319446502] [2023-11-24 21:45:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:52,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:52,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:52,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:52,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:52,589 INFO L124 PetriNetUnfolderBase]: 1593/2178 cut-off events. [2023-11-24 21:45:52,589 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-11-24 21:45:52,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 2178 events. 1593/2178 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8056 event pairs, 113 based on Foata normal form. 34/2207 useless extension candidates. Maximal degree in co-relation 5205. Up to 842 conditions per place. [2023-11-24 21:45:52,607 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 66 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-11-24 21:45:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 92 transitions, 421 flow [2023-11-24 21:45:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-24 21:45:52,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8360655737704918 [2023-11-24 21:45:52,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-24 21:45:52,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-24 21:45:52,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:52,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-24 21:45:52,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,612 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,613 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 125 flow. Second operand 5 states and 255 transitions. [2023-11-24 21:45:52,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 92 transitions, 421 flow [2023-11-24 21:45:52,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:52,623 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 185 flow [2023-11-24 21:45:52,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-24 21:45:52,624 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-24 21:45:52,625 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 185 flow [2023-11-24 21:45:52,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:45:52,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -366085569, now seen corresponding path program 1 times [2023-11-24 21:45:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:52,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977117005] [2023-11-24 21:45:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:52,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977117005] [2023-11-24 21:45:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977117005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718275221] [2023-11-24 21:45:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:52,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:52,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:52,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:52,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:52,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:53,247 INFO L124 PetriNetUnfolderBase]: 1921/2715 cut-off events. [2023-11-24 21:45:53,247 INFO L125 PetriNetUnfolderBase]: For 3380/3386 co-relation queries the response was YES. [2023-11-24 21:45:53,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8094 conditions, 2715 events. 1921/2715 cut-off events. For 3380/3386 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11782 event pairs, 288 based on Foata normal form. 70/2775 useless extension candidates. Maximal degree in co-relation 8076. Up to 1063 conditions per place. [2023-11-24 21:45:53,272 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 79 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2023-11-24 21:45:53,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 103 transitions, 601 flow [2023-11-24 21:45:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2023-11-24 21:45:53,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8131147540983606 [2023-11-24 21:45:53,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 248 transitions. [2023-11-24 21:45:53,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 248 transitions. [2023-11-24 21:45:53,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:53,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 248 transitions. [2023-11-24 21:45:53,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,278 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 185 flow. Second operand 5 states and 248 transitions. [2023-11-24 21:45:53,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 103 transitions, 601 flow [2023-11-24 21:45:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 601 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:45:53,283 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 240 flow [2023-11-24 21:45:53,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2023-11-24 21:45:53,284 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:45:53,285 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 240 flow [2023-11-24 21:45:53,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:53,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:45:53,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:53,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2086592529, now seen corresponding path program 2 times [2023-11-24 21:45:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375212609] [2023-11-24 21:45:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375212609] [2023-11-24 21:45:53,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375212609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:53,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438443940] [2023-11-24 21:45:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:53,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:53,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:53,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:53,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:53,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:53,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:53,944 INFO L124 PetriNetUnfolderBase]: 1835/2652 cut-off events. [2023-11-24 21:45:53,944 INFO L125 PetriNetUnfolderBase]: For 4150/4167 co-relation queries the response was YES. [2023-11-24 21:45:53,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9302 conditions, 2652 events. 1835/2652 cut-off events. For 4150/4167 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11863 event pairs, 348 based on Foata normal form. 94/2732 useless extension candidates. Maximal degree in co-relation 9279. Up to 1412 conditions per place. [2023-11-24 21:45:53,985 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 83 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2023-11-24 21:45:53,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 679 flow [2023-11-24 21:45:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 254 transitions. [2023-11-24 21:45:53,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8327868852459016 [2023-11-24 21:45:53,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 254 transitions. [2023-11-24 21:45:53,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 254 transitions. [2023-11-24 21:45:53,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:53,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 254 transitions. [2023-11-24 21:45:53,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:53,991 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 240 flow. Second operand 5 states and 254 transitions. [2023-11-24 21:45:53,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 679 flow [2023-11-24 21:45:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 109 transitions, 679 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:45:54,002 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 294 flow [2023-11-24 21:45:54,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-24 21:45:54,004 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-11-24 21:45:54,004 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 294 flow [2023-11-24 21:45:54,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:54,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:54,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:45:54,005 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:54,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1667592254, now seen corresponding path program 1 times [2023-11-24 21:45:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323070687] [2023-11-24 21:45:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:54,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:54,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323070687] [2023-11-24 21:45:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323070687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208935046] [2023-11-24 21:45:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:54,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:54,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:54,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:54,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:54,684 INFO L124 PetriNetUnfolderBase]: 1783/2581 cut-off events. [2023-11-24 21:45:54,684 INFO L125 PetriNetUnfolderBase]: For 6468/6485 co-relation queries the response was YES. [2023-11-24 21:45:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10005 conditions, 2581 events. 1783/2581 cut-off events. For 6468/6485 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11424 event pairs, 131 based on Foata normal form. 65/2644 useless extension candidates. Maximal degree in co-relation 9978. Up to 1057 conditions per place. [2023-11-24 21:45:54,714 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 84 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2023-11-24 21:45:54,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 703 flow [2023-11-24 21:45:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-24 21:45:54,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8295081967213115 [2023-11-24 21:45:54,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-24 21:45:54,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-24 21:45:54,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:54,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-24 21:45:54,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,721 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,722 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 294 flow. Second operand 5 states and 253 transitions. [2023-11-24 21:45:54,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 703 flow [2023-11-24 21:45:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 694 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:54,742 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 299 flow [2023-11-24 21:45:54,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2023-11-24 21:45:54,743 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-11-24 21:45:54,744 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 299 flow [2023-11-24 21:45:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:54,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:54,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:45:54,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:54,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash -985343715, now seen corresponding path program 2 times [2023-11-24 21:45:54,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647965225] [2023-11-24 21:45:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:54,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:54,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:54,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647965225] [2023-11-24 21:45:54,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647965225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:54,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:54,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108050971] [2023-11-24 21:45:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:54,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:54,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:54,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:54,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:54,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:54,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:54,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:55,286 INFO L124 PetriNetUnfolderBase]: 1610/2221 cut-off events. [2023-11-24 21:45:55,286 INFO L125 PetriNetUnfolderBase]: For 7005/7022 co-relation queries the response was YES. [2023-11-24 21:45:55,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9187 conditions, 2221 events. 1610/2221 cut-off events. For 7005/7022 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8835 event pairs, 97 based on Foata normal form. 38/2247 useless extension candidates. Maximal degree in co-relation 9158. Up to 897 conditions per place. [2023-11-24 21:45:55,315 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 92 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2023-11-24 21:45:55,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 919 flow [2023-11-24 21:45:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2023-11-24 21:45:55,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8098360655737705 [2023-11-24 21:45:55,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 247 transitions. [2023-11-24 21:45:55,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 247 transitions. [2023-11-24 21:45:55,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:55,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 247 transitions. [2023-11-24 21:45:55,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,321 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,322 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 299 flow. Second operand 5 states and 247 transitions. [2023-11-24 21:45:55,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 919 flow [2023-11-24 21:45:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 894 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:55,346 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 351 flow [2023-11-24 21:45:55,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-11-24 21:45:55,348 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-24 21:45:55,348 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 351 flow [2023-11-24 21:45:55,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:55,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:55,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:45:55,349 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:55,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1629674688, now seen corresponding path program 1 times [2023-11-24 21:45:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653100457] [2023-11-24 21:45:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653100457] [2023-11-24 21:45:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653100457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:55,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:55,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57321805] [2023-11-24 21:45:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:55,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:55,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:55,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:55,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:55,915 INFO L124 PetriNetUnfolderBase]: 1577/2192 cut-off events. [2023-11-24 21:45:55,916 INFO L125 PetriNetUnfolderBase]: For 7189/7211 co-relation queries the response was YES. [2023-11-24 21:45:55,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9664 conditions, 2192 events. 1577/2192 cut-off events. For 7189/7211 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8776 event pairs, 77 based on Foata normal form. 40/2220 useless extension candidates. Maximal degree in co-relation 9633. Up to 983 conditions per place. [2023-11-24 21:45:55,944 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 88 selfloop transitions, 8 changer transitions 4/116 dead transitions. [2023-11-24 21:45:55,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 903 flow [2023-11-24 21:45:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2023-11-24 21:45:55,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8032786885245902 [2023-11-24 21:45:55,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 245 transitions. [2023-11-24 21:45:55,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 245 transitions. [2023-11-24 21:45:55,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:55,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 245 transitions. [2023-11-24 21:45:55,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,949 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,949 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 351 flow. Second operand 5 states and 245 transitions. [2023-11-24 21:45:55,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 903 flow [2023-11-24 21:45:55,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 892 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:55,961 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 354 flow [2023-11-24 21:45:55,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2023-11-24 21:45:55,963 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-11-24 21:45:55,964 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 354 flow [2023-11-24 21:45:55,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:55,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:55,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:45:55,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:55,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash -181551108, now seen corresponding path program 2 times [2023-11-24 21:45:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081605242] [2023-11-24 21:45:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081605242] [2023-11-24 21:45:56,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081605242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:56,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:45:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681021947] [2023-11-24 21:45:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:45:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:45:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:45:56,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:56,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:56,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:56,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:56,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:56,555 INFO L124 PetriNetUnfolderBase]: 1515/2228 cut-off events. [2023-11-24 21:45:56,555 INFO L125 PetriNetUnfolderBase]: For 7475/7485 co-relation queries the response was YES. [2023-11-24 21:45:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9794 conditions, 2228 events. 1515/2228 cut-off events. For 7475/7485 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9995 event pairs, 268 based on Foata normal form. 63/2283 useless extension candidates. Maximal degree in co-relation 9761. Up to 1124 conditions per place. [2023-11-24 21:45:56,583 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 91 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2023-11-24 21:45:56,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 923 flow [2023-11-24 21:45:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 243 transitions. [2023-11-24 21:45:56,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7967213114754098 [2023-11-24 21:45:56,586 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 243 transitions. [2023-11-24 21:45:56,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 243 transitions. [2023-11-24 21:45:56,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:56,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 243 transitions. [2023-11-24 21:45:56,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:56,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:56,591 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:56,592 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 354 flow. Second operand 5 states and 243 transitions. [2023-11-24 21:45:56,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 923 flow [2023-11-24 21:45:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 910 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:56,604 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 394 flow [2023-11-24 21:45:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=85, PETRI_TRANSITIONS=63} [2023-11-24 21:45:56,605 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-11-24 21:45:56,606 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 394 flow [2023-11-24 21:45:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:56,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:56,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:45:56,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:56,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1074097564, now seen corresponding path program 2 times [2023-11-24 21:45:56,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:56,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738190737] [2023-11-24 21:45:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738190737] [2023-11-24 21:45:56,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738190737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:56,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405749400] [2023-11-24 21:45:56,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:45:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:56,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:56,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:45:56,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:45:56,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:56,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:45:56,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:57,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405749400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:57,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:45:57,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-24 21:45:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962922977] [2023-11-24 21:45:57,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:57,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:45:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:45:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:45:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:45:57,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-11-24 21:45:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 63 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:57,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-11-24 21:45:57,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:57,763 INFO L124 PetriNetUnfolderBase]: 1447/2154 cut-off events. [2023-11-24 21:45:57,764 INFO L125 PetriNetUnfolderBase]: For 7041/7057 co-relation queries the response was YES. [2023-11-24 21:45:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9968 conditions, 2154 events. 1447/2154 cut-off events. For 7041/7057 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9812 event pairs, 375 based on Foata normal form. 72/2215 useless extension candidates. Maximal degree in co-relation 9932. Up to 1150 conditions per place. [2023-11-24 21:45:57,810 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 111 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2023-11-24 21:45:57,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1124 flow [2023-11-24 21:45:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:45:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2023-11-24 21:45:57,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8229508196721311 [2023-11-24 21:45:57,813 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 251 transitions. [2023-11-24 21:45:57,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 251 transitions. [2023-11-24 21:45:57,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:57,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 251 transitions. [2023-11-24 21:45:57,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:57,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:57,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:57,817 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 394 flow. Second operand 5 states and 251 transitions. [2023-11-24 21:45:57,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1124 flow [2023-11-24 21:45:57,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1066 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-24 21:45:57,833 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 431 flow [2023-11-24 21:45:57,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=431, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-11-24 21:45:57,835 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-11-24 21:45:57,835 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 431 flow [2023-11-24 21:45:57,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.833333333333336) internal successors, (251), 6 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:57,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:57,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:57,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:58,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:45:58,042 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-24 21:45:58,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1041814034, now seen corresponding path program 1 times [2023-11-24 21:45:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:45:58,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131437587] [2023-11-24 21:45:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:45:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:45:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131437587] [2023-11-24 21:45:58,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131437587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152045597] [2023-11-24 21:45:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:58,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:45:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:58,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:45:58,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45459396-45a6-4b3f-8666-f2987fc0843c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:45:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:59,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:45:59,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:43,849 INFO L327 TraceCheckSpWp]: Computing backward predicates...